VB开发的进行PLC通讯测试的程序，可以做到通讯状态的监控

自己写，西门子直流调速器２台并联控制，速度与励磁调节系统，里包括一个完整封装的USS通信库，可以用到SIMENSE的其它驱动产品中去-Write, Siemens DC drives 2 parallel control, speed and excitation control system, to include a complete package of USS communication library, you can use SIMENSE to other drives in

VB开发的进行PLC通讯测试的程序，可以做到通讯状态的监控-VB development for PLC communications test procedures can be done to monitor the status of communications